- Incinerator
- Waste Gas Treatment
- Environmental Monitoring
Traditional spray tower VS multi-stage catalytic oxidation tower in waste gas treatment
PubDate：2025-09-12 17:15PageView：0
In waste gas treatment, traditional spray towers and multi-stage catalytic oxidation towers are two common treatment equipment, each with its own advantages and applicable scenarios. The following is a comparison of their performance, scope of application, treatment efficiency, operating cost, etc.:
1. Principle comparison
| Item | Traditional spray tower (scrubber) | Multi-stage catalytic oxidation tower |
|---|---|---|
| Working principle | Use liquid absorbent (such as alkali solution, oxidant) to contact with exhaust gas for physical + chemical absorption reaction | Oxidize VOCs in exhaust gas into CO2 and H2O through multi-stage catalyst bed |
| Treatment method | Physical absorption + simple chemical reaction | Deep catalytic oxidation reaction (low temperature or room temperature) |
| Applicable gas | Soluble, polar gases (such as HCl, NH3) | Insoluble, non-polar gas (such as benzene, ketones, alcohols) |
2.Comparison of technical performance
| Item | Traditional spray tower | Multi-stage catalytic oxidation tower |
|---|---|---|
| Purification efficiency | Medium (50~80%) | High efficiency (≥95%) |
| Is there secondary pollution | Yes (waste liquid needs to be treated) | Less (no waste liquid) |
| Operation energy consumption | Low | Medium to low (some need to be heated) |
| Maintenance difficulty | Simple | Medium (catalyst needs to be replaced regularly) |
| Applicable waste gas type | Mainly soluble inorganic gas | Various VOCs (organic waste gas) |
3. Comparison of operating costs and investment
| Item | Traditional spray tower | Multi-stage catalytic oxidation tower |
|---|---|---|
| Equipment investment | Low | Medium~High |
| Operating cost | Lower (but there is absorption liquid consumption) | Higher (catalyst needs to be replaced) |
| Occupied area | Large | Small |
| Automation level | Low | Intelligent control can be achieved |
4. Comparison of applicable scenarios
| Item | Applicable industry |
|---|---|
| Traditional spray tower | Fertilizer, pickling, printing and dyeing, garbage leachate, silicone and other water-soluble waste gas industries |
| Multi-stage catalytic oxidation tower | Chemical, coating, electronics, medicine, rubber, printing and other VOCs organic waste gas emission industries |
5. Summary and suggestions
The waste gas contains a large amount of water-soluble inorganic pollutants → Choose a spray tower.
Treating high-concentration or multi-component VOCs → Choose a multi-stage catalytic oxidation tower, which is more efficient and more stable in meeting the standards.
If the emission standards are high or there is a need for deodorization → catalytic oxidation towers are preferred.
If the budget is limited and only basic deodorization or absorption is required → spray towers can be selected as pre-treatment.
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